[1] Univ Gothenburg, Sahlgrenska Acad, Inst Neurosci & Physiol, Box 455, SE-40530 Gothenburg, Sweden
[2] Sahlgrens Univ Hosp, Queen Silvias Childrens Hosp, Reg Rehabil Ctr Children & Adolescents, Gothenburg, Sweden
[3] Univ Gothenburg, Sahlgrenska Acad, Inst Clin Sci, Dept Paediat, Gothenburg, Sweden